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Prev Professional Automotive Repair Technical Discussions for May 31, 2006
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Open Help Requests for GM
Help Request Answers
1992 Chevrolet S10 2.5L Hydraulic VIN: 1GCCS1A1N8
Clutch would some days work and some days you could not shift.I replaced the slave cylinder and could not get a pedal. Then i replaced the clutch master cylinder and still could nt get a pedal. I bleed it and there does not seem to be any air left. I have very...
1994 Chevrolet Caprice Classic 5.7L abs light VIN: 1G1BN52P5R
i would like some insight to this code i have a 24 telling me that i may have a bad abs pump motor relay but i replaced it a year ago and now light is on again also checked wiring and connections. wondering if there is something that i am overlooking. or that ...
1995 Chevrolet Camaro Z28 5.7L compressor VIN: 2G1FP22P2S
fault code 61--scan shows ac pressure to only 17/lb always. system does work briefly when i disconnect neg. battery. guage readings perfect when ac is running--cools great. tested wiring to pressure switch--b+ wire tests good--5v ref good--ground good--scan da...
1996 Chevrolet Blazer 4.3L no 1-2 shift VIN: 1GNDT13WXT
hello fellow techs. trans had no other issues until we "fixed" it! vehicle now holds in first gear till about 3500 rpm and then goes straight to third gear. tech 2 indicates that second gear is commanded (even though it is clearly in first). in manual second, ...
1996 Chevrolet Corvette 5.7L Moisture VIN: 1G1YY22P2T
Vehicle came in runnign very poorly and we found that opti-spark was malfunctioning due to moisture in the unit. Ew replaced it and it was running well & fine. Vehicle has returned once again with moisture getting into it. Any advice from you guys would be muc...
1999 Chevrolet Express 2500 4.3L Hesitation, Stall, Misfire, MIL Lamp on VIN: 1GCFG25WZX
van towed in for rough running and lack of power, mil lt on, scanned found po339, changed crank sensor after inspecting wiring and no change. vehicle has also developed a po300 misfire code somewhere along the way. low on power on hard acceleration and pinging... Trouble codes: P0339, P0300
1999 Chevrolet Malibu 3.1L a/c switch VIN: 1G1ND52MXX
Hello again, and thanks in advance. Customer scheduled for basic a/c recharge and upon getting vehicle in bay and checking out found the tempature out the vents to be cold and the a/c system pressures were normal. Left vehicle running and it will intermittentl...
2001 Chevrolet Impala LS 3.8L will not complete re VIN: 2G1WH55K91
the battery went dead on this vehicle while it was in my shop. The computer then cleared adn had to reset itself. In my area of Penna vehicles need to be emission tested and two items havent been reset, the catalytic system and the evaporative system. One syst...
2002 Chevrolet 6500 210CID Poor Idle Quality VIN: 1GBJ6H1C72
Hello Diesel Techs, This truck belongs to the shop and is a flat bed wrecker. This truck has 3126 cat (210 HP) in it. If you go down the hiway truck runs fine and all the way to governor cut off(74 mph). About 1500 miles ago all filters were changed and truck...
2000 GMC Jimmy Diamond Edition 4.3L Rear Shocks load level Type VIN: 1GKDT13W4Y
This vehicle equipped with factory Load level system. The original shocks are not avalible. Has any tryed to convert these over to generic Delco air shocks? Our first choice would be to stay with original replacement shock but one side is obsolete. The generic...
1992 Oldsmobile Silhouette 3.8L Poor Idle Quality, Stall VIN: 1GHDU06LXN
Van will die at idle.I checked fire & injection pulse all ok . Did wave form ck. on injectors shows good. Preformed wiggle test & tap test on wirring & mass air flow.No problems. Is worse in colder temps.Mass air flow is clean. Thanks in advance,
2000 Oldsmobile Bravada 4.3L transfer case VIN: T2Y1158522
when making tight turns like parking lot turns driveline will bind to the point were it stop vehicle unless you really accel hard then tires slide and jerk. no codes in system and tires are same type and installed at same time. no codes stored in memory,on lif...
2000 Pontiac Grand Prix GTP 3.8L unknown VIN: 1G2WR5217Y
2000 Pontiac Grand Prix SE 3.8L vibration VIN: 1G2WJ52K3Y
K you front end guys. customer is stating hes having a vibration at about 60 - 80 mph, its worse at times, and is felt in sterring wheel and front end of car. It feels like an out of balanced tire but he just had 2 new front tires installed and balanced a fe...
2002 Saturn SL 1.9L Hesitation, Surge, Misfire VIN: 1G8ZF52812
this saturn once hot, bucks and surges when cruiseing and on exceleration, scan showed missfire history, came in with codes po300,{random missfire}, and po341{cam sensor perf}, dealer says car has no cam sensor, installed plugs and wires, now no codes present,...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Cadillac DeVille DTS 4.6L Hesitation, Surge, Cuts out VIN: 1G6KF5799Y
Greetngs, After having the car for another day,and not finding any codes for anything,including transmission,we sent back to dealer,suggesting a possible PCM. Dealer installed another fuel pump,customer claims its better,but not right.IMO symptoms point el...
1998 Chevrolet K2500 Suburban 7.4L No Start VIN: 3GNGK26J0W
Hello all After rechecking residual pressure on fuel rail after shutting off vehicle we finally got this thing to act up and saw the fuel pressure bleed off which gave us extended crank time. We have installed a new fuel pump assy and delivered truck. Have not...
2000 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 1G1JC5241Y
Thanks to Rich from Illinois and John from Michigan, who were both dead on. The body ground on this car is provided by a bolt on connection at the battery tray. It is VERY easy to overlook. When I inspected this one, the bolt was loose and had nearly fallen ou... Trouble codes: U1000 (Communication), U1016 (Communication), U1040 (Communication), U1064 (Communication), U1088 (Communication), U1096 (Communication).
2000 Chevrolet Silverado 1500 5.3L engine VIN: 2GCEK19T8Y
well this one is costing the customer $5000.00 we found a bad camshaft. camshaft and lifters cost alot and you have to pull heads. do you fix a 155,000 mile motor or replace it especially if there is metal from the cam in the motor. after seeing the responses ...
2001 Chevrolet S10 4.3L No Start VIN: 1GCCT19W31
pinched wire found in loom running back to fuel pump module.. considerable amount of off road 4 wheeling done with this unit which I'm sure contributed to the problem. thanks for all the assistance. Duane Trouble codes: P0452.
2002 Chevrolet Impala 3.4L HVAC and cruise VIN: 2G1WF55E02
Have not been able to get the car back for the final inspection and subsequent repair. Due to the information that I received from everyone it seems that the problem is the harness connection at the ignition switch which I suspected and have seen on other GM v...
2004 Chevrolet Silverado 3500 6.0L MIL Lamp on VIN: 1GBJC34U84
Thanks to everyone who replied.the fix was the ground wire at the back of the engine.After previous voltage drop test on powers and ground tested good,we were able to duplicate the condition by pulling on the harness. Trouble codes: U, 0107 (lose communication with TCM).
1998 Oldsmobile Aurora 4.0L Headlights VIN: 1G3GR62C6W
Thanks to all who replied to my help request. The simple voltage test at pin B1 at the module confirmed a faulty headlight switch. Voltage was fluctuating from 7 to 10 volts. I really appreciate the professional and prompt response. Thanks again... Jim
1997 Pontiac Trans Sport 3.4L Power windows/front blower VIN: 1GMDXO3EIV
Thanks to all who wrote back, you guys nailed it. I lifted the carpet under the passengers front and the heavy orange wires were coroded in half at the splice. A quick solder job had everything working again.
2000 Pontiac Montana 3.4L Hesitation, Cuts out VIN: 1GMDX13E9Y
We finally got the van back in the shop and replaced the other crank sensor, the one in the side of the block. The customer has had it back for a week now and all is well. Thanks so much to all who helped out.
2001 Pontiac Grand Prix GT 3.8L Very High Idle VIN: 1G2WP52K11
Well, guys. I'd love to be able to tell you that this problem is definitively fixed and what the cause was. Unfortunately, that is not the case. Several of you talked about the carpet being in the way. We checked but that doesn't interfere with the pedal. More...
2002 Pontiac Grand Am SE1 2.2L No Start VIN: 1G2NF52F32
Thanks for the response to my dilemma. We have not repaired the vehicle because of cost so my final diagnosis was not proven true. Here's what I did know. The customer took the car back because we couldn't duplicate problem. Three days later she calls back and...
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